Luminescence and defects creation processes in Bi3+-doped gallium garnets
Baran M. Kissabekova A. Krasnikov A. Reszka A. Vasylechko L. Zazubovich S. Zhydachevskyy Y.
January 2023Elsevier B.V.
Journal of Luminescence
2023#253
Microcrystalline powders of Y3Ga5O12:Bi and Gd3Ga5O12:Bi are investigated by the X-ray diffraction, scanning electron microscopy, time-resolved photoluminescence, and thermally stimulated luminescence methods in a wide temperature range (4.2–500 K). The results are compared with those obtained recently for the Lu3Ga5O12:Bi powder. The presence of the ultraviolet (UV) emission of a Bi3+ ion and the visible (VIS) emission of an exciton localized around the Bi3+ ion is confirmed for all the investigated gallium garnets. The processes of photostimulated creation of electron and hole centers taking place under irradiation in the 4–6 eV energy range are investigated. The origin of the hole centers responsible for the UV and VIS electron recombination luminescence is clarified. Electron transitions between the energy levels of Bi3+ ions and the Bi3+ → Ga3+oct, Bi3+ → Ga3+tetr, and Bi3+ → Y3+ or Bi3+ → Gd3+ electron transfer transitions are found to appear in the photo- and thermoluminescence excitation spectra. The Bi3+ energy level positions in the band gap are determined. Their influence on the luminescence and photostimulated creation of electron and hole centers is discussed.
Bi3+-doped gallium garnets , Time-resolved photoluminescence , TSL , XRD
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Łukasiewicz Research Network - Institute of Microelectronics and Photonics, Wólczyńska 133, Warsaw, 01-919, Poland
Pavlodar Pedagogical University, Mira 60, Pavlodar, 140000, Kazakhstan
Institute of Physics, University of Tartu, W. Ostwaldi 1, Tartu, 50411, Estonia
Institute of Physics, Polish AS, Al. Lotników 32/46, Warsaw, 02-668, Poland
Lviv Polytechnic National University, Bandera 12, Lviv, 79013, Ukraine
Łukasiewicz Research Network - Institute of Microelectronics and Photonics
Pavlodar Pedagogical University
Institute of Physics
Institute of Physics
Lviv Polytechnic National University
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